Roughneck Bolster & Chisel Set with Non-Slip Guards, 3 PieceRoughneck 3 Piece Bolster & Chisel Set with Non Slip Guards is manufactured from drop forged and heat treated superior quality chrome vanadium steel to ensure outstanding toughness and long life performance. The 45 single chamfer cutting edge offers the optimal balance between cutting performance and longevity. Each piece is equipped with a patented non slip guard that securely locks onto the shaft. Eliminates the age old problem of grips slipping up